微细通道内过冷水温度对蒸汽直接接触间歇凝结界面波动的影响研究  

Study of Sub-cooled Water Temperature on the Interface Wave for Direct Contact Condensation in a Micro Channel

作　　者：侯娜娜 李树谦 张东 张强武 马坤茹[2] Hou Nana;Li Shuqian;Zhang Dong;Zhang Qiangwu;Ma Kunru(The Civil Engineering College,Hebei University of Water Resources and Electric Engineering,Cangzhou 061001,China;The Construction Engineering College,Hebei University of Science and Technology,Shijiazhuang 050018,China;Hebei Technology Innovation Center of Phase Change Thermal Management of Internet Data Center,Cangzhou 061001,China;Cangzhou Technology Innovation Center of Thermal Storage and Low-grade Waste Heat Utilization of Electromagnetic Heating,Cangzhou 061001,China)

机构地区：[1]河北水利电力学院土木工程学院,河北沧州061001 [2]河北科技大学建筑工程学院,河北石家庄050018 [3]河北省数据中心相变热管理技术创新中心,河北沧州061001 [4]沧州市储热及低品位余热利用型电磁供热技术创新中心,河北沧州061001

出　　处：《南京师大学报（自然科学版）》2022年第1期22-31,共10页Journal of Nanjing Normal University(Natural Science Edition)

基　　金：国家自然科学基金项目(51976052);河北省自然科学基金项目(E2020412176);沧州市自然科学基金项目(197000004);2020年河北省高等学校基本科研业务费研究项目.

摘　　要：为了探究过冷水温度对T型微细通道内蒸汽直接接触间歇凝结过程的影响,开展了可视化实验研究.采用高速摄像机(帧率为5000 fps)捕捉到了蒸汽温度100℃、蒸汽体积流量550μL/min及过冷水体积流量14758μL/min等参数恒定且过冷水温度分别为30℃、40℃和50℃工况下,1000 ms内汽液界面瞬时演变行为.研究发现,微细通道条件下蒸汽泡在间歇凝结过程中会相继发生多次“颈缩”和“内爆”现象,且随过冷水温度升高“内爆”后的汽液两相区面积逐渐增加;此外,随过冷水温度的升高凝结频率总体减低,而1000 ms内每个间歇凝结周期所需时间的变化趋势与该周期内的汽液两相区最大面积的变化趋势基本一致.The visualization experiments were carried out in order to investigate the influence of sub-cooled water temperature on the chugging for steam direct condensation in a T-ype micro channel.Steam-water interface transient evolution process in 1000ms was obtained through a high-speed camera(5000 fps),under the condition of steam temperature of 100℃,steam volume flow rate 550μL/min,and sub-cooled water volume flow rate 14758μL/min with different sub-cooled water temperature(i.e.30℃,40℃and 50℃).The research indicates that there exists continually“necking”and“implosion”during steam bubble condensation in the micro channel.Additionally,steam-water two-phase areas after“implosion”increase,while the condensation frequencies decrease with the increase of sub-cooled water temperature.The changes of times which needed for each chugging period in 1000 ms are generally consistent with the variation tendency of largest steam-water two-phase areas.

关 键 词：T型微细通道 间歇凝结 过冷水温度 “颈缩” “内爆” 凝结频率 

分 类 号：TK124[动力工程及工程热物理—工程热物理]